Hi wonder if you can help me a little bit...

Im sharing my local and have created three good exchanges and i am getting some great cards from other people in return...they are all clearing fine and i am suffering very little freeze...
Im getting all the usual european stuff...but i obviously want to make sure the card i am sharing is of good quality as well as what i am resharing...
I have a good connection from my DM500 and have a good ping and speed is not an issue...
Is there a maximum number of people before the info i am sharing becomes distored and starts to freeze at the other end ?...Is 3 shares about right or can i safely reinforce the shares i have..i just dont want the people i share with to suffer..any ideas anyone ?

Thanks in advance for any input..